package com.sunfeng.socket.part4;


import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

/**
 * @Author : 孙峰
 * @Description:
 * @Date : 2021/10/19  11:30
 */
public class TimeClient {
    public void connect(String host, int port) throws InterruptedException {
        NioEventLoopGroup group = new NioEventLoopGroup();

        Bootstrap bootstrap = new Bootstrap();

        try {
            bootstrap.group(group)
                    .channel(NioSocketChannel.class)
                    //启动TCP_NODELAY，就意味着禁用了Nagle算法，允许小包的发送。对于延时敏感型，同时数据传输量比较小的应用，开启TCP_NODELAY选项无疑是一个正确的选择。
                    //Nagle算法就是为了尽可能发送大块数据，避免网络中充斥着许多小数据块。
                    .option(ChannelOption.TCP_NODELAY, true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ChannelPipeline pipeline = ch.pipeline();
                             pipeline.addLast(new LineBasedFrameDecoder(1024));
                           pipeline.addLast(new StringDecoder());
                            pipeline.addLast(new TimeClientHandler());
                        }
                    });
            ChannelFuture channelFuture = bootstrap.connect(host, port).sync();
            channelFuture.channel().closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }

    }

    public static void main(String[] args) throws InterruptedException {
        new com.sunfeng.netty.atguigu.linebasedframedecoder.TimeClient().connect("127.0.0.1",8888);
    }
}
